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| author | Janusz Dziedzic <janusz.dziedzic@tieto.com> | 2013-11-05 14:48:47 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-11-25 20:49:42 +0100 |
| commit | 40d1ba63ff4ae1a73b0042202b54b688ada469be (patch) | |
| tree | 8f83891a9a253df3e6c10ce2150f4fe6b9567dad /net/wireless/chan.c | |
| parent | c17aa52c5bf571533cc8561292f7316b9216eddc (diff) | |
| download | linux-40d1ba63ff4ae1a73b0042202b54b688ada469be.tar.gz linux-40d1ba63ff4ae1a73b0042202b54b688ada469be.tar.bz2 linux-40d1ba63ff4ae1a73b0042202b54b688ada469be.zip | |
cfg80211: add helper functions for start/end freq
Add helper fuctions for start/end freq.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/chan.c')
| -rw-r--r-- | net/wireless/chan.c | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 344966496b70..1d25a462b145 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -277,6 +277,32 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy, width, dfs_state); } +static u32 cfg80211_get_start_freq(u32 center_freq, + u32 bandwidth) +{ + u32 start_freq; + + if (bandwidth <= 20) + start_freq = center_freq; + else + start_freq = center_freq - bandwidth/2 + 10; + + return start_freq; +} + +static u32 cfg80211_get_end_freq(u32 center_freq, + u32 bandwidth) +{ + u32 end_freq; + + if (bandwidth <= 20) + end_freq = center_freq; + else + end_freq = center_freq + bandwidth/2 - 10; + + return end_freq; +} + static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, u32 center_freq, u32 bandwidth) @@ -284,13 +310,8 @@ static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, struct ieee80211_channel *c; u32 freq, start_freq, end_freq; - if (bandwidth <= 20) { - start_freq = center_freq; - end_freq = center_freq; - } else { - start_freq = center_freq - bandwidth/2 + 10; - end_freq = center_freq + bandwidth/2 - 10; - } + start_freq = cfg80211_get_start_freq(center_freq, bandwidth); + end_freq = cfg80211_get_end_freq(center_freq, bandwidth); for (freq = start_freq; freq <= end_freq; freq += 20) { c = ieee80211_get_channel(wiphy, freq); @@ -337,13 +358,8 @@ static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, struct ieee80211_channel *c; u32 freq, start_freq, end_freq; - if (bandwidth <= 20) { - start_freq = center_freq; - end_freq = center_freq; - } else { - start_freq = center_freq - bandwidth/2 + 10; - end_freq = center_freq + bandwidth/2 - 10; - } + start_freq = cfg80211_get_start_freq(center_freq, bandwidth); + end_freq = cfg80211_get_end_freq(center_freq, bandwidth); for (freq = start_freq; freq <= end_freq; freq += 20) { c = ieee80211_get_channel(wiphy, freq); |